P

Inventor

CHENG QIANWEN

CN9 patents
⚠️ This page may combine multiple inventors who share the name “CHENG QIANWEN”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

FENG XIAOGEN

4 patents
US8293673B2Oct 23, 2012

Process for preparing 4-aminodiphenylamine

FENG XIAOGEN4 citations70
US9029603B2May 12, 2015

Process for preparing alkylated p-phenylenediamines

FENG XIAOGEN0 citations49
US8486223B2Jul 16, 2013

Falling film evaporator

FENG XIAOGEN1 citations49
US8686188B2Apr 1, 2014

Process for preparing 4-aminodiphenylamine

FENG XIAOGEN1 citations46

JIANGSU SINORGCHEM TECH CO LTD

2 patents
US7989662B2Aug 2, 2011

Process for preparing 4-aminodiphenylamine

JIANGSU SINORGCHEM TECH CO LTD3 citations59
US8349230B2Jan 8, 2013

Spherical rubber chemicals and the method for preparing the same

JIANGSU SINORGCHEM TECH CO LTD0 citations48

SINORGCHEM CO SHANDONG

1 patent
US7235694B2Jun 26, 2007

Process for preparing 4-aminodiphenylamine

SINORGCHEM CO SHANDONG16 citations87

SINORGCHEM SHANDONG CO LTD

1 patent
US7084302B2Aug 1, 2006

Process for preparing 4-aminodiphenylamine

SINORGCHEM SHANDONG CO LTD12 citations87

SINORGCHEM COMPANY SHANDONG

1 patent
US7176333B2Feb 13, 2007

Process for preparing 4-aminodiphenylamine

SINORGCHEM COMPANY SHANDONG16 citations78